The Sunday Times opens its travel clinic on a daily basis to answer your holiday queries. Today: hostels in Australia: Or right next to Central station in a converted parcel shed, there's the Railway Square YHA (8-10 Lee Street, 00 61 2 9281 9666). Some of the dorms are in cleverly repro carriages, and there's a roof pool, great common areas, cafĂ© and bar. Eight person dorms are £8.50 (singles/doubles £40).